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Array type inferior insulator local electric field detector and inverse diagnosis method

A low-quality insulator, local electric field technology, applied in the direction of measurement device, electrostatic field measurement, measurement of electricity, etc., can solve the problems of low safety, unsuitable for prevention and management needs, unable to meet high-voltage transmission line insulation safety warning information system, etc. , to achieve the effect of operating safety

Inactive Publication Date: 2009-11-11
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantage of the current electric field method is that when the voltage level increases, the number of insulator sheets in each string will increase, and the workload of measurement is relatively large.
It belongs to contact measurement, and the operation safety is not high
At the same time, this method cannot do quantitative detection and has no data for analysis. It is no longer suitable for the development of modern high-voltage power grids and the needs of scientific prevention management, and cannot meet the requirements of establishing a high-voltage transmission line insulation safety early warning information system.

Method used

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  • Array type inferior insulator local electric field detector and inverse diagnosis method
  • Array type inferior insulator local electric field detector and inverse diagnosis method
  • Array type inferior insulator local electric field detector and inverse diagnosis method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Example 1 Array Type Inferior Insulator Local Electric Field Detection Device

[0052] Consists of on-site detection device 1 and data processing center 2; where

[0053] 1), on-site detection device 1 is made of electric field sensor array 11, high-speed data collector 12, central information processor 13, GSM data communication module 14, solar cell 15 and power management circuit 16;

[0054] a), the electric field sensor array 11 is used for the local electric field signal of the insulator string in the on-the-spot acquisition work, is fixed on the three connection ends of measuring bar by at least three electric field sensors and forms, and its output terminal of sensor and the input of high-speed data collector 12 terminal connection;

[0055] b), the high-speed data collector 12 is used for converting the electric field intensity analog signal collected into a digital signal, and its output end is connected with the input end of the central information processor...

Embodiment 2

[0064] Embodiment 2 Using the array-type inferior insulator local electric field detection device described in claim 1, reverse diagnosis of whether the insulator is degraded and the method of determining its specific site number: the method includes the following steps:

[0065] 1), establish the insulator site number and corresponding voltage value given by the national standard under different voltage levels, and the database of the voltage distribution curve of the insulator string;

[0066] 2), establish an on-site electric field sensor measurement array, the number of electric field sensors used in the measurement array of each insulator string A is less than the number of insulators, but not less than 3, and collect data;

[0067] 3) The local electric field signal of the insulator string will be obtained and transmitted to the host computer through the GPRS network;

[0068] 4), according to the basic principles of the analog charge method and the least square method, ...

Embodiment 3

[0119] Embodiment 3 An actual measurement effect

[0120] Table 1 shows the standard voltage distribution (kV) of 110kv insulators

[0121]

[0122] Table 2 shows the electric field distribution at the measurement point when the 110kv insulator is inferior (kV / m)

[0123]

[0124] Table 3 shows the regularized voltage distribution (kV) of the 110kv electric field inverse problem

[0125]

[0126] Through the field electric field sensor array, the collected data is shown in Table 2. According to the basic principles of the analog charge method and the least square method, as shown in formulas (1) and (3), the actual voltage level on the insulator string is obtained as shown in Table 3; thus The obtained actual voltage level and the insulator standard voltage level in Table 1, draw the actual voltage and standard voltage curve distribution as Figure 6 shown.

[0127] diagnosis:

[0128] 1. If the actual voltage distribution curve at the corresponding corresponding ...

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Abstract

The invention relates to an array type inferior insulator local electric field detector and an inverse diagnosis method of inferior insulators, which comprises the steps of: implementing non-contact type online quantitative monitoring on a circuit insulator, diagnosing the existence of the inferior insulator through the reverse diagnosis method, really reflecting the insulation safety situation of the circuit insulator, building an insulation safety prewarning information system and implementing effective pre-control management on high-tension transmission lines. The array type inferior insulator local electric field detector consists of a field detector and a data processing center; the method is based on 'electric field method' measuring, which applies the basic principle of the charge simulation method to build a corresponding geometric and mathematical equivalent model. The method obtains the actual voltage distribution of an insulator string by working out the solution of an insulator electric field inverse problem, and compares the actual voltage distribution of the insulator string with the international given voltage distribution to judge the existence and position of the interior insulator in the insulator string.

Description

technical field [0001] The invention relates to the field of local electric field detection of inferior insulators, in particular to an array-type local electric field detection device for inferior insulators and a reverse diagnosis method for inferior insulators. Background technique [0002] In order to realize the detection of inferior insulators and the on-line monitoring of insulator status, many methods have been adopted at home and abroad. Although the current methods of monitoring and testing insulators have their own advantages, there are still some shortcomings, such as the inability to monitor on-line for a long time, the intensity of detection work is relatively high, the working environment is not ideal (many need to climb the tower), and it is affected by weather conditions. Larger etc. At present, the commonly used methods for detecting inferior insulators are: [0003] 1) Insulation resistance measurement method. The insulation resistance of inferior insul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R29/12G01R31/00
Inventor 张占龙胡平张斌荣杨帆何为毛玉星
Owner CHONGQING UNIV
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